Prefer a chat interface with context about you and your work?
Evidence from anisotropic penetration depth for a three-dimensional nodal superconducting gap in single-crystalline<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mtext>Ba</mml:mtext><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mtext>Fe</mml:mtext></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Ni</mml:mtext></mml:mrow><mml:mi>x</mml:mi…
The London penetration depth, $\ensuremath{\lambda}$, is directly related to the density, ${n}_{s}$, of the Cooper pairs $({\ensuremath{\lambda}}^{2}\ensuremath{\propto}1/{n}_{s})$ and its variation with temperature provides valuable insight into the pairing mechanism. Here we study the evolution with doping of the temperature dependence of the in-plane $({\ensuremath{\lambda}}_{ab})$ and out-of-plane $({\ensuremath{\lambda}}_{c})$ penetration depths in …